Due to higher line pressures required with disc brakes, it
is recommended that a power assist unit be added to the system. These vacuum
assist units are the solution! Frame mount booster kits bolt directly to
where the original master cylinder mounted (except 1955-57 Chevy car). Some
kits include the pedal and others utilize the original pedal. Kits include:
booster and frame mount brackets, linkage to connect to the pedal, and master
cylinder. Disc/drum and disc/disc kits also include proportioning valve
and bracket assembly. Kits available in 7" or 8" and both single
and dual diaphragm. If not specified, default booster diameter for your
application will be provided. Note: #CP6XX kits do not include proportioning
valve assembly.